 <template>
   <!-- 最外层的容器 -->
   <view class="my-settle-container">
     <!-- 全选区域 -->
     <label class="radio" @click="changeAllState">
       <radio color="#C00000" :checked="isFullCheck" /><text>全选</text>
     </label>

     <!-- 合计区域 -->
     <view class="amount-box">
       合计:<text class="amount">{{checkedGoodsAmount}}</text>
     </view>

     <!-- 结算按钮 -->
       <view class="btn-settle" @click="settlement">结算({{checkedCount}})</view>
   </view>
 </template>

 <script>
   import {
     mapGetters,
     mapMutations,
     mapState
   } from 'vuex'
   export default {
     data() {
       return {
         //倒计时的秒数
         seconds: 3,
         //定时器的id
         timer: null
       }
     },
     computed: {
       ...mapGetters('m_cart', ['checkedCount', 'total', 'checkedGoodsAmount']),
       ...mapGetters('m_user', ['addstr']),
       ...mapState('m_user', ['token']),
       ...mapState('m_cart', ['cart']),
       // 2. 是否全选
       isFullCheck() {
         return this.total === this.checkedCount
       }
     },
     methods: {
       ...mapMutations('m_cart', ['updateAllGoodsState',  'removeGoodsById', 'updateGoodsCount']),
       ...mapMutations('m_user', ['updateRedirectInfo']),
       changeAllState() {
         // 修改购物车中所有商品的选中状态
         // !this.isFullCheck 表示：当前全选按钮的状态取反之后，就是最新的勾选状态
         this.updateAllGoodsState(!this.isFullCheck)
       },
       //用户点击了结算按钮
       settlement(goods) {
         if (!this.checkedCount) return uni.showToast({
           title: '请选择要结算的商品！', // 要显示的文字内容
           icon: 'none', // 图标，可选参数，这里使用 'none' 表示不显示图标
           duration: 1500 // 显示时间，单位为毫秒，默认为 1500
         })

         if (!this.addstr) return uni.showToast({
           title: '请选择收货地址！', // 要显示的文字内容
           icon: 'none', // 图标，可选参数，这里使用 'none' 表示不显示图标
           duration: 1500 // 显示时间，单位为毫秒，默认为 1500
         })

         if (!this.token) return this.delayNavigate()
         //4.实现微信支付功能
         this.payOrder()
       },
       //定义微信支付功能
       async payOrder() {
         // 1. 创建订单  
         // 1.1 组织订单信息对象  
         const orderInfo = {
           order_price: 0.01,
           order_address: this.addstr,
           goods: this.cart.filter(x => x.goods_state).map(x => ({
             goods_id: x.goods_id,
             goods_number: x.goods_count,
             goods_price: x.goods_price
           })),
         };
         // 1.2 发起请求创建订单
         const {data: res} = await uni.request({
           url: 'http://localhost:3000/my/orders/create',
           method: 'POST',
           data: orderInfo,
           timeout: 10000 // 设置超时时间
         });

         if (res.meta.status !== 200) return uni.showToast({
           title: '创建订单失败！',
           icon: 'none',
           duration: 1500
         });

         //1.3 得到服务器响应的"订单编号"
         const orderNumber = res.message.order_number
         const {data: res2} = await uni.request({
           url: 'http://localhost:3000/my/orders/req_unifiedorder',
           method: 'POST',
           data: {
             order_number: orderNumber
           },
           timeout: 10000 // 设置超时时间
         });
         if (res2.meta.status !== 200) return uni.showToast({
           title: '预付订单生成失败！',
           icon: 'none',
           duration: 1500
         });
         const payInfo = res2.message.pay

         const {data: res3} = await uni.request({
           url: 'http://localhost:3000/my/orders/chkOrder',
           method: 'POST',
           data: {
             order_number: orderNumber
           },
           timeout: 10000 // 设置超时时间
         });
         if (res3.meta.status !== 200) return uni.showToast({
           title: '订单未支付！',
           icon: 'none',
           duration: 1500
         });
         uni.showToast({
           title: '支付完成！',
           icon: 'success',
           duration: 1500
         });
       },
       //延时导航到my页面
       delayNavigate() {
         this.seconds = 3,
           this.showTips(this.seconds)
         this.timer = setInterval(() => {
           this.seconds--

           if (this.seconds <= 0) {
             clearInterval(this.timer)

             uni.switchTab({
               url: '/pages/my/my',
               success: () => {
                 this.updateRedirectInfo({
                   openType: 'switchTab',
                   from: '/pages/cart/cart'
                 })
               }
             })

             return;
           }
           this.showTips(this.seconds);
         }, 1000);
       },
       //展示倒计时的提示消息
       showTips(n) {
         uni.showToast({
           icon: 'none',
           title: '请登录后再结算！' + n + ' 秒后自动跳转到登录页',
           mask: true,
           duration: 1500
         })
       }
     }
   }
 </script>

 <style lang="scss">
   .my-settle-container {
     /* 底部固定定位 */
     position: fixed;
     bottom: 0;
     left: 0;
     /* 设置宽高和背景色 */
     width: 100%;
     height: 50px;
     background-color: cyan;
   }

   .my-settle-container {
     position: fixed;
     bottom: 0;
     left: 0;
     width: 100%;
     height: 50px;
     // 将背景色从 cyan 改为 white
     background-color: white;
     display: flex;
     justify-content: space-between;
     align-items: center;
     padding-left: 5px;
     font-size: 14px;

     .radio {
       display: flex;
       align-items: center;
     }

     .amount {
       color: #c00000;
     }

     .btn-settle {
       height: 50px;
       min-width: 100px;
       background-color: #c00000;
       color: white;
       line-height: 50px;
       text-align: center;
       padding: 0 10px;
     }
   }
 </style>